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_~ <br />ADDENDUM REPORT <br />iii iiiiiiiiiiiii iii <br />999 <br />ABANDONMENT OF SOIL EXPLORATION DRILL HOLES <br />In wmpliance with SeMion 4.07.3 (3), the following information is provided to the Colorado Division of Mining <br />and Geology (CDMG): <br />Total number of drill holes: 22 <br />Start of Drilling: Julv 15. 1996 Completion of drilling: Julv 19. 1996 <br />Completion of Permanent Sealing: July 23. 1996 <br />Name of Drilling_Contraclor: Lambert and Associates. Montrose. Colorado <br />License Number of Drill and Rie: Unavailable <br />Tvce of CemenUSealant Used: Readi-mix Concrete (all holes) <br />Description of how holes were worked: All holes were drilled using a 4" OD continuous flight auger, which <br />was removed ceriodically to allow split spoon sampling at different <br />depths. The number of split spoon samples cer hole and the total <br />depth of drilling varied. (See Table 1). After drilling was completed. <br />each hole was backlilled by the driller with cuttings to l0 feet below <br />Rrade. Mountain Coal Comoanv emplovces came in afterwards. <br />(generally within 24 hours), mixed and poured concrete plugs to <br />within at least 3 feet below grade (a minimum 7 foot plug or minimum <br />0.6 CF of concrete per hole), and filled the remainder of the hole with <br />additional cuttings. Surface disturbances due to the track mounted <br />drill rig were hand graded and mulched with straw. <br />Hole Number" Surface Elevation Drilled Depth Drilled Diameter Water Table <br />DH.I 6241.5' 17' 4" dry <br />DH.2 6338.7' 4' 4" dry <br />DH.3 6340.2' 25.5" 4" dry <br />DH.4 6385.1' 23' 4" 12' <br />DH.S 6369.4' 26.5' 4" dry <br />DH.6 6418.1' 15.5' 4" dry <br />DH.7 6441.0' 9' 4" dry <br />DH.8 6459.7' 25.5' 4" 17' <br />DH.9 6472.8' 25' 4" 16' <br />DH.10 6495.6' 17' 4" dry <br />DH.11 6578.4' 15' 4" dry <br />DH.12 6598.5' 13.5' 4" dry <br />DH.13 6643.2' 25.5' 4" 25.5' <br />DH.14 6646.2' 25' 4" 22' <br />DH.15 6681.3' 25' 4" 19.5' <br />DH.16 6710.7' 25' 4" dry <br />DH.17 6727.1' 16' 4" dry <br />DH.18 6642.6' 15.5' 4" l4' <br />DH.19 6693.5' 20.5' 4" 24' <br />DH.21 6751.7' 15.5' 4" dry <br />DH.24 6794.8' 20' 4" dry <br />DH.25 6859.1' 39.5' 4" dry <br />"SEE ATTACHED LOCATION MAP <br />MountainCoal Company <br />8/19/96 <br />